Fix cyclic dependency between mesh and rendering.

Core/CMakeLists.txt

Core/Color.cpp

Core/Color.h

Core/ConfigRendering.h

Core/CoreClass.h

Core/Light.h

Core/RenderDetail.cpp

Core/RenderDetail.h

Core/Scene.cpp

Core/SceneObject.h

Core/StaticSceneObject.h

Core/ViewerBase.h

Examples/renderCube/main.cpp

Examples/vegaFem/main.cpp

Mesh/CMakeLists.txt

Mesh/SurfaceMesh.cpp

Mesh/SurfaceMesh.h

RenderDelegates/PlaneRenderDelegate.cpp

RenderDelegates/SurfaceTreeRenderDelegate.cpp

Rendering/ConfigRendering.cpp